A friend of mine has a 1970 Mach One with the 428 Super Cobra Jet engine. He bought it brand new. We drove it to work for several years. He had a 3 barrell Holley on it. It would clean my 390 AMX's clock. He put it away after a few kids and it and mine sat in storage for years. He got the mustang back out last summer, restored it and it is a perfect one owner car. Just wonder what it would be worth. It isn't for sale either.